CVE-2021-24564

WPFront Scroll Top <= 2.0.5 - Authenticated Stored Cross-Site Scripting

2021-07-26 00:00

Strategic Overview

Status: Patched in 2.0.6
Affected Plugin: WPFront Scroll Top
Affected Version: <= 2.0.5
CVSS: 5.4Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24564

View all WPFront Scroll Top vulnerabilities

At a glance

CVE-2021-24564 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WPFront Scroll Top WordPress plugin, affecting versions <= 2.0.5. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 2.0.6; sites on affected versions should update now. Disclosed July 2021, reported by Asif Nawaz Minhas.

Vulnerability Overview

The WPFront Scroll Top WordPress plugin before 2.0.5 does not sanitise or escape its Image ALT setting before outputting it attributes, leading to an Authenticated Stored Cross-Site Scripting issues even when the unfiltered_html capability is disallowed.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in WPFront Scroll Top <= 2.0.5 takes any authenticated account. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For WPFront Scroll Top the fix is 2.0.6: builds <= 2.0.5 are affected, anything from 2.0.6 onward is not.

Remediation

Update to version 2.0.6, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to WPFront Scroll Top: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WPFront Scroll Top 2.0.6 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24564 https://www.wordfence.com/threat-intel/vulnerabilities/id/adb84461-6675-497f-ac53-cf72bd4c17bc https://nvd.nist.gov/vuln/detail/CVE-2021-24564

CVSS Vector

5.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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